Wheels
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Wheels are usually made from pressed steel or cast aluminum alloy. They should be lightweight, yet strong enough to withstand normal operational forces.
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Rim sizes & designations
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Rim width is the distance across the rim flanges at the bead seat. Its diameter is the distance across the center of the rim from bead seat to bead seat.
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Types of wheels
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Passenger cars normally use rims which are of well based, or drop-center design. The drop-center is used for mounting and demounting the tire onto the rim.
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